I don`t claim anything, It is you who say such nonsense what if sudently only one sex remained would they survive. And i think it the evolution would have gone the road of only one sex, than yeah than it would have survived, there are a lot of spicies in nature who survive(hermafrodites, dunno how its spelled in english), but they can survive by millions of years of evolution. Btw, why you are so against homosexuals? I for one dont care, let them be, they aint harming me in any way, at least no more than heterosexuals if not less.
In this day of age if all men died i think women would survive without problem